Long time ago I was waiting for my turn to use the weighting scale on a scrapyard when I stepped over something curious.
Inside a sturdy chunk of mud there were the remains of an electric drill but what got my attention was the keyless chuck. I asked at the counter and got it for free.
It slept for some time on a shelf until I found it again cleaning. It resisted a civilized dismantling intent so I bathed it overnight in a mix of gasoline and paint thinner.
The front came out easily and looked good enough given it’s history except for a couple of spots with tool wounds and corrosion with significant missing iron. Seems it had been passivated on the inside.
There’s a two hole pig nut on the back and that one gave more trouble. I first tried with a round nose pliers and then a punch but it only made things worse.
I used a heat gun to clear any remnant of gasoline, hoping that it would loose the threads but no cigar. So I welded a piece of scrap and with that I managed to pry it.
Compared to the rest this part looked much better. I expected a ball bearing but there was only a hardened steel ring instead.
I padded a couple of beads on the body and after a bit of careful grinding it’s like it never spent time buried.
Now I only have to fix the horrible amount of run-out and play of the drill press.
We have this old scope for the students. It’s been unused for a while as it behaved erratically and then stopped working completely.
After setting the trigger to a more or less sane value I had something on the screen but the controls where flaky. A heavy dose of our deoxit equivalent and twisting it sprang to life. I adjusted the dc offset (drifts a bit while warming up) and matched the channel gains as much as I could and called it a day.
During the last week I began to clean and dismantle the engine of that Peugeot 504 using whatever spare time I had.
I started by removing the battery plate, water and vacuum reservoirs and the hoses connecting them. I took a couple of detailed pictures so I don’t forget how to put it back together later.
I spent a while trying to figure out how to remove the radiator, it’s bolted to the car frame and there’s a plastic cover around the fan blades that doesn’t let it move up. The most obvious way seemed to remove the front grill and the body panel behind it but in order to do that I would have to tear apart the original glue and make a couple of cuts. I kept looking and feeling around until I discovered that the air guide is only held by two nuts on the top and locking pins on the bottom.
After removing them, it glided freely upwards and then to the back. With nothing else holding it, the radiator also came out.
That freed up some space in the engine bay. I moved on to the belts. This is a very good time to take note of how everything is installed.
Then I moved onto the hoses. Some were hard and brittle and others felt like new. But all were filled with rusty mud.
The water pump was no better, the impeller stayed inside the block.
The radiator has a lovely copper corrosion growth. After draining it I poured hot water on one side and let it flow, touching along the fins to see if there were clogs. Except for a small hand sized area on the bottom everything seemed fine.
Both the brakes and clutch didn’t work (besides not having fluid, the cylinders were stuck) so I set up to dismantle them.
After some contortions I managed to free the mechanism. A couple of hard lines broke around the fittings and part of the servo assist snapped while I was pulling.
The air filter in this unit is an oil bath one and was perfectly full. After draining it I used lots of gasoline, kitchen cleaner and boiling water to remove every trace of grim and oil. But now the filth migrated to the sink.
I also removed the valve cover to take a peek inside. It looks surprisingly clean and neat for a car of this age. The gasket was torn apart, that may explain the amount of oil on the block.
Today I bought a used battery and decided to crank this old Peugeot 504 to see if the engine was seized or other problems lurked.
It’s been sitting there since 1998 but the diesel in the tank did not smell funny so I used the little pump on the filter until it became hard. On the last strokes I heard a subtle noise and there was a tiny leak on the line.
When connecting the battery there was a small spark and the position lights turned on. I let the glow plugs do their job and tried to crank.
Nothing, just a small click of a relay inside the dash. After a couple of times it turned with some effort but refused to start.
I let the battery rest for a moment and tried again. This time it roared as I pressed the accelerator, puffed some smoke and then idled calmly. I can hardly believe it awoke from a two decade slumber just like that.
Now I have to fix the water circuit (the hoses are dry and crumbling) and the clutch so I can move it around with a bit of ease.
That’s a 1981 Peugeot 504 (diesel) that belonged to my grandfather. After his death about 20 years ago it’s been sitting first on the original garage and lately inside this shed that we are fixing up.
The tires have an inner tube as it was usual on that era and that’s an advantage, I doubt that any contemporary tubeless would still be sealed after spending so long being flat.
Tire after 20 years.
Tire after 20 years.
I had a bit of space to speed up while pushing and the front wheels went by with relative ease. However, there’s a small step and I couldn’t make it go further with the initial momentum alone.
I lifted the car with a jack and made a small ramp out of bricks and a slab of wood. I carefully released the jack and the car slowly moved on its own. The underside looks quite good for a machine of that vintage.
Hoy todas las chicas geek están de fiesta, celebrando el día de Ada Lovelace, la primer y gran Geek. Afortunadamente en la sociedad actual hay cada vez mas modelos positivos de mujer geek , mis “ídolas” son Becky Stern y Limor Fried. Soñar no cuesta nada…
Hace unos días me traje a casa un torno de relojero que perteneció a mi abuelo (entre muchas otras profesiones fué relojero). Tengo que volver a buscar los contrapuntos y el plato divisor pero dentro de todo está bastante completo. Mas fotos después del salto.
La última vez que se me cayó la baba de semejante forma con un aparato electrónico fue cuando intenté (sin éxito) de reparar el equipo de rayos x en el cig. Releyendo mails viejos me encontré con el reloj de este señorito. Tiene todo para dejarme medio bobo por un buen rato. Es un reloj, tiene tubos nixie (no de los mas interesantes pero tubos al fin), y el diseño es exquisito pero sin descuidar la funcionalidad. Hasta me gustan los led en las bases, algo que siempre desprecié.